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Home / Kathmandu — Koh Samui

Cheap flights Kathmandu — Koh Samui

Kathmandu (KTM, NP) Koh Samui (USM, TH)
from $397 2 542 km ~3h 29m 2 flights found 2 airlines cheapest on Friday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $397 on 08.01.2027
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
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Th
Fr
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Su
December 2026
Mo
Tu
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January 2027
Mo
Tu
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Prices found for 2 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
08 Jan 2027, Fri
THAI Airways TG 320
10:45
KTM Tribhuvan International Airport
15:50
USM Koh Samui Airport
5h 5m 1 stop
Kupi.com
$397
View this ticket
02 Dec 2026, Wed
IndiGo 6E 1162
18:05
KTM Tribhuvan International Airport
01:25
USM Koh Samui Airport
7h 20m 2 stops
Aviakassa
$469
View this ticket
Route characteristics
Distance
2 542 km
Flight time
3h 29m
Time difference
+1h
Minimum price
from $397 (08.01.2027)
Average price
$433
Maximum price
$469
Cheapest day
Friday
Departure airports (1)
KTM Tribhuvan International Airport
Arrival airports (1)
USM Koh Samui Airport
Airlines (2)
TG THAI Airways 6E IndiGo
Agencies (2)
Kupi.com Aviakassa
Prices by day of week
Wednesday
$469
avg $469
Friday
$397
avg $397
Cheapest
Price trend by month
December 2026
from $469
avg $469
1 flights
January 2027
from $397
avg $397
1 flights
Airlines — cheapest prices 2
THAI Airways
THAI Airways
1 flights · 1 days
$397
IndiGo
IndiGo
Low-cost 1 flights · 1 days
$469
Where to buy tickets 2
Kupi.com
1 tickets · 1 days
from $397
Aviakassa
1 tickets · 1 days
from $469
Airports

From — Kathmandu (1)

  • KTM Tribhuvan International Airport

To — Koh Samui (1)

  • USM Koh Samui Airport
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Frequently asked questions about the route Kathmandu — Koh Samui
How long is the flight from Kathmandu to Koh Samui?
Approximate flight time — 3h 29m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Kathmandu to Koh Samui?
The straight-line distance — 2 542 km.
How much do flights from Kathmandu to Koh Samui cost?
The minimum price over 3 months — from $397 on 08.01.2027.
What is the average ticket price?
The average price — $433. Range: $397 — $469.
What is the time difference between Kathmandu and Koh Samui?
The difference — +1h.
From which airports does Kathmandu operate flights?
From Kathmandu: KTM (Tribhuvan International Airport).
To which airports in Koh Samui do flights arrive?
To Koh Samui: USM (Koh Samui Airport).
Which airlines fly this route?
This route is served by 2 airlines: THAI Airways, IndiGo.
Which day of the week is cheapest?
The cheapest day of the week — Friday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Kathmandu — Koh Samui

Flights Kathmandu — Koh Samui is a popular route. The straight-line distance is 2 542 km. Flight time 3h 29m. Time difference +1h.

From Kathmandu (KTM) flights depart from 1 airport: KTM. To Koh Samui (USM) — 1 arrival airport: USM.

2 airlines operate on this route: THAI Airways, IndiGo.

The minimum price for the next 3 months — from $397 (08.01.2027). The cheapest dates are highlighted in the calendar above.

The average ticket price — $433, ranging from $397 to $469. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Friday.

Other destinations in Thailand from Kathmandu
Bangkok
TH
Chiang Mai
TH
Hua Hin
TH
Phuket
TH
Krabi
TH
Surat Thani
TH
Pattaya
TH

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